electron beam(n = noun.phenomenon) beam, ray - a group of nearly parallel lines of electromagnetic radiation;
is a kind of electromagnetic radiation, electromagnetic wave, nonparticulate radiation
has particulars: cathode ray, particle beam

balance beam, beam, beam balance, beam of light, beam scale, beam tree, box beam, electron, electron accelerator, electron emission, electron gun, electron lens, electron microscope, electron microscopic, electron microscopy, electron multiplier, electron optics, electron orbit, electron paramagnetic resonance, electron radiation, electron shell, electron spin resonance, electron tube, electron volt, free electron, high beam, inoic beam, ion beam, laser beam, light beam, low beam, on the beam, particle beam, radio beam, tie beam, valence electron